Hand preference and sex shape the architecture of language networks

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Abstract
In right‐handed subjects, language processing relies predominantly on left hemisphere networks, more so in men than in women, and in right‐ versus left‐handers. Using DT‐MRI tractography, we have shown that right‐handed men are massively interconnected between the left‐hemisphere language areas, whereas the homologous in the right hemisphere are sparse; interhemispheric connections between the language areas and their contralateral homologues are relatively strong. Women and left‐handed men have equally strong intrahemispheric connections in both hemispheres, but women have a higher density of interhemispheric connections. Hum Brain Mapp, 2006.